In a forest spot's sheet, Walk this spot starts a walk the forager chooses to begin. While it runs, Houby uses location in a foreground service so it keeps working with the screen off. An ongoing notification shows how the forest under your feet scores (today's weather at the spot × the tree cover where you stand) and the distance and direction back to where you started. It updates after every 25 m.
The walk ends when you tap End walk in the notification or in the app, or on its own after six hours. Positions stay on the phone and are dropped when the walk ends; the route is not stored or sent anywhere.